1872.] F. Stoliezka — On the Cgclostomacea of Penang. 267 



exactly as in the South Indian Pteroc. (My 'xo stoma) tristis, Blf., and which 

 canal is the origin of the sutural tube, becoming fully developed in the 

 more adult shell, as soon as the end of the last whorl begins to detach itself 

 from the previous one. 



Sab. Penang ; I have only obtained about 15 specimens of this species, 

 also under dead leaves on the ground in dense jungle together with the last, 

 winch is, however, the more common one. 



The animal is entirely of a rather pale grey colour, nearly smooth, slight- 

 ly mottled with darker ; tentacles blackish, with a few darker spots about 

 and between their bases, entirely black at tip ; rostrum cleft, wrinkled, with a 

 pale lip ; lateral pedal row rather indistinct, as also in the preceding species. 



Fam. PupnratE. 

 Paphaulus Loraini, which was described by Pfeiffer from Penang out 

 of Cuming's collection, was not met with by me. 



PupraA aureola, n. sp. PI. X, Figs. 11-12 



P. testa oblique ovata, apice breviter sub-acuta, glaberrima, politissima, 

 moderate solida, intense vel luteole succinea, prope peristoma aurea ; an- 

 fractibus sex, convexiusculis, in adultis sutura indistincta junctis, primis 

 duobus sub-mammillatis, ultimo spira breviore, valde descendente ; apertura 

 parva, cireulari, labio incrassato, sulco satis profundo ab anf. penultimo 

 separato ; incisionibus angustis sed profundus ; labro antice sensimproducto, 

 extus paulmn incrassato, aureo tincto. Operculum orbieulare, altu/in, corneum, 

 ad utrumque latus paulo concavnm, ex lamella sprialiter torta tennissima 

 compositu/m, nucleo depresse cireulari, paullulum incrassato instructum. 

 Long, tested 8 "8, lat. ad medium 5, dia/m. apert. ext. 2*3 m.m. 



Sab. Penang ; haudfrequens. 



This species is closely allied to P. aurea, Hinds, differing from it by a 

 smaller aperture, a more laterally produced, shorter and slightly contracted 

 last whorl. The solidity of the shell and the intensity of coloration naturally 

 varies with age ; young specimens are thin, and nearly transparent, pale 

 straw-coloured, the suture is distinctly impressed and the outer lip very 

 slightly produced. In adolescent specimens the upper labial rib is rather 

 distant from the posterior angle of the mouth (see fig 11), as in the 

 Tenaserim P. arula, but the Penang shell is shorter and stouter. Old 

 specimens are entirely covered with a polished glaze, and are intensely or 

 yellowish rufous brown, with a yellow inner and outer peristome. 



The animal is of the usual Cyclophorid type, uniform, intense or greyish 

 black, paler along the sides of the foot, which is of about the same length 

 as that of the shell. 

 35 



